04-17-2019 07:44 AM
I have a multi-Gig serial lane which goes through poor PCB. (So IBERT's eye is not so good) I want to collect all transceiver properties (both TX and RX) which effects directly on the eye. I guess almost all PMA properties, but which are these? Here is the menu of IBERT to choose parameters:
I mean: There are several transceiver settings, which appears in IBERT menu, however most of them are above PMA (Ex.: 8B/10B enabling does not affect the eye)
I found the following ones:
TX: TXDIFFSWING, TXPRE, TXPOST, TXPOSTCURSORINV, TXPRECURSORINV
RX: RXTERM, RX_DFE_CTLE_STAGE*, RX_DFE_GAIN_CFG, RX_DFE_*_CFG
Are these parameters worst to sweep? Are there any further?
04-17-2019 08:09 AM
can you post a picture of the eye ?
04-25-2019 05:19 PM
Please post the eye diagram.
Have you tried adjusting the TX parameters in the IBERT, e.g. TXDIFFCTRL, TXPRECURSOR, TXPOSTCURSOR?
What is your channel insertion loss?